340GHz eighth harmonic mixer

Abstract

The invention provides a 340GHz eighth harmonic mixer. The 340GHz eighth harmonic mixer comprises a radio-frequency input waveguide, a radio-frequency waveguide-suspended microstrip transition structure, a diode, a radio-frequency suppressing low-pass filter, a suspended microstrip-microstrip interconnecting structure, an intermediate-frequency filter, a local oscillator waveguide-microstrip transition structure and a local oscillator input waveguide; a radio-frequency signal is input from the radio-frequency input waveguide and coupled and fed into the diode via the radio-frequency waveguide-suspended microstrip transition structure; the intermediate-frequency filter, the local oscillator waveguide-microstrip transition structure and the local oscillator input waveguide are combined to form a local oscillator-intermediate-frequency duplexer; a local oscillator is fed into the diode after orderly passing through the duplexer, the suspended microstrip-microstrip interconnecting structure and the radio-frequency suppressing low-pass filter; the radio-frequency signal and the local oscillator signal are mixed in the diode and a mixed signal is output. According to the 340GHz eighth harmonic mixer, an eighth harmonic mixing form is adopted so that the local frequency is greatly reduced; meanwhile, the size of the mixer is effectively reduced and the manufacturing difficulty and cost are reduced.

Description

technical field [0001] The invention relates to a mixer, in particular to a 340GHz eighth harmonic mixer. Background technique [0002] Terahertz (THz) waves or terahertz (THz) rays were officially named only in the middle and late 1980s. Before that, scientists collectively called them far-infrared rays. Terahertz waves refer to electromagnetic waves with a frequency between 0.1 and 10 THz, which are located between microwaves and infrared rays on the electromagnetic spectrum. Its long-wave band overlaps with millimeter waves (submillimeter waves), and its development mainly relies on electronics science and technology; And its short-wave band overlaps with infrared rays, and its development mainly relies on photonics science and technology. It can be seen that terahertz waves are the transition frequency band from macro-electronics to micro-photonics, and occupy a very special position in the electromagnetic spectrum. However, due to the lack of effective generation and d...

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